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llvm-project/llvm/test/CodeGen/AArch64/sve-pred-arith.ll
Momchil Velikov 50a97aacac [AArch64] Async unwind - function prologues 
Re-commit of 32e8b550e5439c7e4aafa73894faffd5f25d0d05

This patch rearranges emission of CFI instructions, so the resulting
DWARF and `.eh_frame` information is precise at every instruction.

The current state is that the unwind info is emitted only after the
function prologue. This is fine for synchronous (e.g. C++) exceptions,
but the information is generally incorrect when the program counter is
at an instruction in the prologue or the epilogue, for example:

```
stp	x29, x30, [sp, #-16]!           // 16-byte Folded Spill
mov	x29, sp
.cfi_def_cfa w29, 16
...
```

after the `stp` is executed the (initial) rule for the CFA still says
the CFA is in the `sp`, even though it's already offset by 16 bytes

A correct unwind info could look like:
```
stp	x29, x30, [sp, #-16]!           // 16-byte Folded Spill
.cfi_def_cfa_offset 16
mov	x29, sp
.cfi_def_cfa w29, 16
...
```

Having this information precise up to an instruction is useful for
sampling profilers that would like to get a stack backtrace. The end
goal (towards this patch is just a step) is to have fully working
`-fasynchronous-unwind-tables`.

Reviewed By: danielkiss, MaskRay

Differential Revision: https://reviews.llvm.org/D111411
2022-03-24 16:16:44 +00:00

163 lines
5.7 KiB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve < %s | FileCheck %s
; LEGAL ADDS
define <vscale x 16 x i1> @add_nxv16i1(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b) {
; CHECK-LABEL: add_nxv16i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.b
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = add <vscale x 16 x i1> %a, %b
ret <vscale x 16 x i1> %res;
}
define <vscale x 8 x i1> @add_nxv8i1(<vscale x 8 x i1> %a, <vscale x 8 x i1> %b) {
; CHECK-LABEL: add_nxv8i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.h
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = add <vscale x 8 x i1> %a, %b
ret <vscale x 8 x i1> %res;
}
define <vscale x 4 x i1> @add_nxv4i1(<vscale x 4 x i1> %a, <vscale x 4 x i1> %b) {
; CHECK-LABEL: add_nxv4i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.s
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = add <vscale x 4 x i1> %a, %b
ret <vscale x 4 x i1> %res;
}
define <vscale x 2 x i1> @add_nxv2i1(<vscale x 2 x i1> %a, <vscale x 2 x i1> %b) {
; CHECK-LABEL: add_nxv2i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.d
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = add <vscale x 2 x i1> %a, %b
ret <vscale x 2 x i1> %res;
}
; ILLEGAL ADDS
define aarch64_sve_vector_pcs <vscale x 64 x i1> @add_nxv64i1(<vscale x 64 x i1> %a, <vscale x 64 x i1> %b) {
; CHECK-LABEL: add_nxv64i1:
; CHECK: // %bb.0:
; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: addvl sp, sp, #-1
; CHECK-NEXT: .cfi_escape 0x0f, 0x0c, 0x8f, 0x00, 0x11, 0x10, 0x22, 0x11, 0x08, 0x92, 0x2e, 0x00, 0x1e, 0x22 // sp + 16 + 8 * VG
; CHECK-NEXT: str p8, [sp, #3, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p7, [sp, #4, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p6, [sp, #5, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p5, [sp, #6, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p4, [sp, #7, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: ptrue p8.b
; CHECK-NEXT: ldr p4, [x1]
; CHECK-NEXT: ldr p5, [x0]
; CHECK-NEXT: ldr p6, [x3]
; CHECK-NEXT: ldr p7, [x2]
; CHECK-NEXT: eor p0.b, p8/z, p0.b, p5.b
; CHECK-NEXT: eor p1.b, p8/z, p1.b, p4.b
; CHECK-NEXT: eor p2.b, p8/z, p2.b, p7.b
; CHECK-NEXT: eor p3.b, p8/z, p3.b, p6.b
; CHECK-NEXT: ldr p8, [sp, #3, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p7, [sp, #4, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p6, [sp, #5, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p5, [sp, #6, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p4, [sp, #7, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: addvl sp, sp, #1
; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
%res = add <vscale x 64 x i1> %a, %b
ret <vscale x 64 x i1> %res;
}
; LEGAL SUBS
define <vscale x 16 x i1> @sub_xv16i1(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b) {
; CHECK-LABEL: sub_xv16i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.b
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = sub <vscale x 16 x i1> %a, %b
ret <vscale x 16 x i1> %res;
}
define <vscale x 8 x i1> @sub_xv8i1(<vscale x 8 x i1> %a, <vscale x 8 x i1> %b) {
; CHECK-LABEL: sub_xv8i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.h
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = sub <vscale x 8 x i1> %a, %b
ret <vscale x 8 x i1> %res;
}
define <vscale x 4 x i1> @sub_xv4i1(<vscale x 4 x i1> %a, <vscale x 4 x i1> %b) {
; CHECK-LABEL: sub_xv4i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.s
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = sub <vscale x 4 x i1> %a, %b
ret <vscale x 4 x i1> %res;
}
define <vscale x 2 x i1> @sub_xv2i1(<vscale x 2 x i1> %a, <vscale x 2 x i1> %b) {
; CHECK-LABEL: sub_xv2i1:
; CHECK: // %bb.0:
; CHECK-NEXT: ptrue p2.d
; CHECK-NEXT: eor p0.b, p2/z, p0.b, p1.b
; CHECK-NEXT: ret
%res = sub <vscale x 2 x i1> %a, %b
ret <vscale x 2 x i1> %res;
}
; ILLEGAL SUBGS
define aarch64_sve_vector_pcs <vscale x 64 x i1> @sub_nxv64i1(<vscale x 64 x i1> %a, <vscale x 64 x i1> %b) {
; CHECK-LABEL: sub_nxv64i1:
; CHECK: // %bb.0:
; CHECK-NEXT: str x29, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: addvl sp, sp, #-1
; CHECK-NEXT: .cfi_escape 0x0f, 0x0c, 0x8f, 0x00, 0x11, 0x10, 0x22, 0x11, 0x08, 0x92, 0x2e, 0x00, 0x1e, 0x22 // sp + 16 + 8 * VG
; CHECK-NEXT: str p8, [sp, #3, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p7, [sp, #4, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p6, [sp, #5, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p5, [sp, #6, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: str p4, [sp, #7, mul vl] // 2-byte Folded Spill
; CHECK-NEXT: ptrue p8.b
; CHECK-NEXT: ldr p4, [x1]
; CHECK-NEXT: ldr p5, [x0]
; CHECK-NEXT: ldr p6, [x3]
; CHECK-NEXT: ldr p7, [x2]
; CHECK-NEXT: eor p0.b, p8/z, p0.b, p5.b
; CHECK-NEXT: eor p1.b, p8/z, p1.b, p4.b
; CHECK-NEXT: eor p2.b, p8/z, p2.b, p7.b
; CHECK-NEXT: eor p3.b, p8/z, p3.b, p6.b
; CHECK-NEXT: ldr p8, [sp, #3, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p7, [sp, #4, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p6, [sp, #5, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p5, [sp, #6, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: ldr p4, [sp, #7, mul vl] // 2-byte Folded Reload
; CHECK-NEXT: addvl sp, sp, #1
; CHECK-NEXT: ldr x29, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
%res = sub <vscale x 64 x i1> %a, %b
ret <vscale x 64 x i1> %res;
}
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